jack kennedy lowered taxes and increased growth. >> now you're jack kennedy. [ laughter ] >> first of all, i was there -- >> just one of several jab exchanges during last night's spirited vice-presidential debate. two men also sparred over judicial appointments, abortion, taxes, and unemployment. the polls split on who won that debate. cbs news showed vice president biden won about 50% to congressman ryan's 31%. here in california, the margins a little narrower. >>> both joe biden and paul ryan got right back on the campaign trail hoping to build on any post debate momentum. cbs reporter danielle nottingham shows us how both sides are claiming victory. >> reporter: vice president joe biden continues to play offense in wisconsin friday. >> it's time romney and ryan and the republican congress take a pledge to the middle class people saying we're going to level the playing field. >> reporter: a day after a spirited vice-presidential debate. >> with all due respect that's a bunch malarkey. >> watch out, middle class, the tax bill is coming to you. >> reporter: both candidates headed back